due to the complex structure of the pressure-adjusting device used in most sprinklersfor variable irrigation, it is not possible to observe the flow behavior of the water passingthrough the flow field. in this paper, an integral three dimensional (3d) numerical modelbased on the structural characteristics of the fluidic sprinkler was constructed to simulatethe flow field distribution using comp...

Context Many regions in the world have undergone rapid land use change and intensification of agricultural land, such as through irrigation expansion, upgrading systems, changing grassland, stock, nutrient management practices. With more intensive use, changes to soil properties can occur, compaction water storage. The effects modern sprinkler-irrigated pastoral farming on physical are not well...

water user cooperatives were formed due to consideration to people's empowerment and participation in water investment and management. the purpose of this study was to investigate the mechanisms of development and strengthening of water user cooperatives in the aras river basin. the study population consisted of the management board members of the water user cooperatives in the aras basin in th...

ABSTRACT- Efficient use of irrigation water for summer crops should be considered seriously due to rare occurrence of precipitation in summer. This research was focused on the assessment of water use efficiency for dominant crops of summer cropping pattern in the study area (i.e., maize and rice) via considering water productivity (WP) with different water management scenarios at farm level at ...

The occurence of corrosion is a potentially major problem for all sprinkler systems. It could cause a problem for the operational reliability as well as for the performance reliablity. It is of course negative for the operational reliability if corrosion causes plugged piping, clogging of control valves or simply non-opening sprinkler heads. All of which may well be the effect of uncontrolled c...

Phenamiphos, ethoprop, and carbofuran each at 6.7 kg a.i./ha were applied to squash, southern pea, and corn via injection into a sprinkler irrigation system. This method was then compared with a conventional application of phenamiphos and ethoprop granules spread on the soil surface and incorporated into the top 15 cm for control of Macroposthonia ornata and Meloidogyne incognita. Nematode popu...

Population growth and climate change require efficient use of water resources per unit area. In this study, the relationships between irrigation systems, land sizes crop patterns farmers in coastal areas were determined to provide useful information for better agricultural management. A survey study was conducted with 170 using stratified sampling method. The relationship varieties, methods by ...

The September and October (2013) wind storms in Canterbury, New Zealand had highest worldwide reported windstorm damaged on centre pivot irrigation systems. Around 800 centre pivot has been damaged and it cost farmers millions dollars directly and indirectly. It was very difficult to find the engineering proofed recommendation for farmers to protect their irrigation systems during windstorms. T...

Agricultural irrigation is a primary user for freshwater withdrawal. Irrigation plays an important role in crop production, as it provides the benefit of reducing effects prolonged dryness and erratic precipitation. Center pivot system most common agriculture. As center ages, could develop leaking joint, clogged sprinklers, physical damage. This can cause areas non-uniformity that lead to under...